Safety locking device for the shifting mechanism of metal planers



- 1,622,159 c. E. LINDEN ET AL SAFETY LOCKING DEVICE FOR THE SHIFTINGIECHANISI bl" IBTAL PLARBIS March 22 1927.

Filed June 18, 1923 III ATTDRAfKS.

Patented Mar. 22, 1927.

UNITED STATES Parent orries.

CARL E. LINDEN AND GEORGE E. LANGEN, 0.1 CINCINNATI, UHIO,"ASSIGN6RS TOTHE CINCINNATI PLANER COMPANY, 01? CIN SAFETY LOCKING DEVICE FOR THEvSl-IIFIHQ'G MECHANISM OF CIENA'II, cure, a conrona'rron OF'OHIO.

METAL PLANE-REL Application filed June is, 1923. Serial No. 646,143.

The object of our invention is to provide a locking device for tumblerhandles for the shifting mechanism for metal planets and machine toolswhich if left unlocked will become locked even if accidentally struck bythe workman in arranging the work on the planer table. v i

It may happen that even if a lock is provided to prevcnt accidentalstarting of the machine, if the handle has been left unlocked it may heaccidentally shifted to start the.

machine and serious damage or injury result. It is our aim, therefore,to arrange the parts so that the handle, unless intentionally shifted,will be thrown into locked position by any unintentional pressureagainst it.

This end is accomplished by the certain novel construction andarrangement of parts to be hereinfter more particularly pointed out andclaimed in the description and claims that follow.

In the drawings:

Figure 1 is a front elevation of the tumbier assembly for the planer.

Figure 2 is a vertical transverse section taken through the handleconnection.

Figure 3 is a perspective view of the sliding bushing and lockingwasher.

Figure 4 is a central horizontal section of the device.

A portion of the side frame of the planer is shown at 1 and a portion ofthe planer table at 2. Mounted to rock on a fixed stud 3 projecting fromthe side frame of the planer is the shifting tumbler 4, the upper end ofwhich is in position to be struck by the front and rear dogs fixed tothe reciprocating table and to rock the tumbler to actuate theconnecting rod 5 which connects with the belt shifters for the cuttingand return belts, for driving and returning the planer bed.

For starting the planer a handle 6 is provided. This handle is pivotedon a stud 7, in a cored-out portion in thefront of the tumbler hub, withbearing plates 8, 8 above and below through which the fulcrum studpasses. A cover plate 9 is also employed for the hub recess with anoblong opening through which the handle passes.

The inner end of the handle is provided with a rounded head 10 Whichengages a circular recess 11 in a sliding bushing or i sleeve 12,secured by a key 13 tothe tumbler so as toescillate with the tumbler butadapted to slide lengthwise therein. This bushing is provided with aslot 14 adapted to engage, when the bushing is shifted, a tongue 15projecting from the rear face of a lock asher l6 which is keyed orpinned to the outer end of the fixed stud 3 upon which the tumbler ismounted.

The washer has a flange 17 to engage over the outer end of the tumblerand the tumbler is secured by the nut 18 on' the threaded end of thestud 3.

The normal active positionv of the handle 6 is shoWn by the dotted linesin Figure 4 with the head of the handle holding the bushing free fromthe lock washer, and in this position the handle can be raised to shiftthe belts and start the machine. To look the handle so that it cannot beraised, the handle is pushed inwardly and this shifts the bushing sothat it becomes locked to the Washer.

in order to hold the bushing in either position notches 19 are cut inthe outer surface in proper position and these notches are engaged by aspring plunger 20 seated in a boss 21 on the tumbler hub.

While we have illustrated our safety look as applied to belt shiftingmechanism for a planer it is, of course, obvious that the constructioncan be applied to other constructions of starting devices.

As the handle projects laterally from the tumbler it is obvious that ifthe handle should be left unlocked and accidental pressure brought tobear thereon, say by work menin setting up the work on the machine, theeffect will be to shift the handle inwardly (and thus lock the tumblerto the fixed stu It is also obvious that inasmuch as the sliding bushingis keyed to the tumbler, the handle cannot be moved to locking positionexcept when the tumbler is in idle position, as in any other positionthe tongue on the locking washer cannot engage the bushing.

Having thus described our invention, what- We claim as new and desire tosecure by Letters Patent is y 1. In a safety locking device of thecharacter specified, a tumbler, and a handle for manually operating thesame, with means controlled by the handle for locking the tumbleragainst movement when the handle is moved in other than a tumbleroperating direction.

2. In a safety locking device of the character specified, a tumbler, anda handle for manually operating the same, with means controlled by thehandle for locking the tumbler against movement when the handle is movedin other than a tumbler operating direction, said means being operativeonly when the tumbler is in idle position.

3. In a safety locking device of the character specified, a pivotedtumbler, with a handle secured thereto for operating same, a pivot forthe handle to permit angular movement thereof and a shiftable membersecured to the tumbler to rock therewith, with connection therefor withthe handle, and a fixed member With which the shiftable member engagesto lock the tumbler from oscillation upon an angular movement of thehandle.

4. In a safety device of the character specified, the combination withthe planer frame and a fixed stud projecting therefrom, of a tumblerpivoted on the stud, a handle secured to the tumbler pivoted thereon topermit angular movement thereof, a shiftable member secured to thetumbler to rock therewith, with connection therefor with the handle, anda fixed member on the stud to be engaged by said shiftable member tolock the tumbler from movement. a

5. In a safety device of the character specified, the combination withthe planer frame and a fixed stud projecting there from, of a tumblerpivoted on the stud, a handle secured to the tumbler pivoted thereontopermit angular movement thereof, a

sliding bushing for the tumbler keyed there to, with the handle inengagement therewith and a plate fixed on the tumbler stud having atongue to engage said bushin shifted by the handle to lock the tumbleragainst movement.

CARL E. LINDEN. GEORGE H. LANGEN.

When 1

